WTB 69 valiant signal lens's

I have a 69 valiant grille in my duster and it has "good" lens's in it already but they have so stress cracking in the from age and I would like to get a new set.

does anyone here have a set or know where they can be got and at what kind of price? are there any other vehicles that used these lenses or just the 69 valiant?

thanks in advance